BD meaning in Community ?

A music(al) director or director of music is the person responsible for the musical aspects of a performance, production, or organization. This would include the artistic director and usually chief conductor of an orchestra or concert band, the director of music of a film, the director of music at a radio station, the person in charge of musical activities or the head of the music department in a school, the coordinator of the musical ensembles in a university, college, or institution (but not usually the head of the academic music department), the head bandmaster of a military band, the head organist and choirmaster of a church, or an organist and master of the choristers (the title given to a director of music at a cathedral, particularly in England).